/// <summary>
/// Removes the given <paramref name="item"/> and all its children
/// from this scene by setting the <paramref name="item"/>'s
/// <see cref="GraphElement.Parent"/> to null (and thereby making
/// that item its own scene in certain aspects).
/// </summary>
/// <param name="item">The <see cref="GraphElement"/> to remove from
/// this scene by setting its parent to null.</param>
public void RemoveItem(GraphElement item)
{
item.SetParent(null);
}
/// <summary>
/// Adds or moves the given <paramref name="item"/> and all its
/// children to this scene by setting this scene as the
/// <paramref name="item"/>'s <see cref="GraphElement.Parent"/>.
/// </summary>
/// <param name="item">The <see cref="GraphElement"/> to add to
/// this scene by making this scene its parent.</param>
public void AddItem(GraphElement item)
{
item.SetParent(this);
}
